Alternative form of back-to-back

With one's back facing that of somebody else. / Consecutively; one after the other. / (poker slang) Synonym of wired (“being a pair in seven card stud with one face up and one face down”)

plural of back-to-back

simple past tense and past participle of back

(obsolete, slang) Put on one's back; killed; rendered dead. / (in combination) Having specified type of back. / (in combination) Having specified type of backing.

Used other than figuratively or idiomatically: see back, into. / (sports, idiomatic) To advance to the post-season as a result of another team's loss, especially where one's own team has also lost.

Support, especially financial. / A liner or other material added behind or underneath. / (television, film) A backdrop. / (music) Musicians and vocalists who support the main performer.

(music) Providing support for the main performer.

present participle of back

(Canada, US) behind